Ivar Giaever je fizik, prejemnik Nobelove nagrade za kemijo 1973 »za eksperimentalna odkritja povezana s tunelskim pojavom v polprevodnikih in superprevodnikih.«.
Giaever javno izraža svoj globok dvom do globalnega segrevanja in ga označuje kot novodobno religijo. V največjem norveškem časniku Aftenposten leta 2011 zapiše “It is amazing how stable temperature has been over the last 150 years.”
Udeležuje se konferenc dobitnikov nobelovih nagrad Lindau Nobel Laureate Meeting. Iz srečanja leta 2012 Wikipedija povzema tudi naslednje trditve . Ko komentira pomembnost dviga temperatur pravi: “What does it mean that the temperature has gone up 0.8 degrees Kelvin: probably nothing.” In še “Is climate change pseudoscience? If I’m going to answer the question, the answer is: absolutely.“
Na srečanju leta 2015 velja povzeti naslednjo njegovo izjavo, v kateri je utemljil tudi svoj izstop iz The American Physical Society : “ The American Physical Society , which I was a member, say that “the evidence is incontrovertible”, that global warming exists. Now think about that. This is a physical society, and they say “you cannot discuss global warming, because we believe it’s happening.” It’s like the Catholic Church. There are lots of incontrovertible truth[s] in the Catholic Church, I’m sure. And here there’s a[n] incontrovertible truth in a physical society. So the only answer to that, is to resign and I resign in 2011.”
Giaever je trenutno znanstveni svetovalec The Heartland Institute.